package com.atguigu.gulimall.product.exception;

import com.atguigu.common.exception.BizCodeEnume;
import com.atguigu.common.utils.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import java.util.HashMap;
import java.util.Map;

/**
 * 集中处理所有的异常
 */
@Slf4j
//@ControllerAdvice(basePackages = "com.atguigu.gulimall.product.controller")
//@ResponseBody/*这个类返回的所有数据都是json数据 所以需要用到@ResponseBody注解*/
@RestControllerAdvice(basePackages = "com.atguigu.gulimall.product.controller")/*这个注解包括了@ResponseBody和@ControllerAdvice这两个注解*/
public class GulimallExceptionControllerAdvice {

    @ExceptionHandler(value = MethodArgumentNotValidException.class)
    public R handleValidException(MethodArgumentNotValidException e){
        log.error("数据校验出现问题: {}, 异常类型: {}", e.getMessage(), e.getClass());

        Map<String, String> errorMap = new HashMap<>();
        BindingResult bindingResult = e.getBindingResult();

        bindingResult.getFieldErrors().forEach((fieldError)->{
            errorMap.put(fieldError.getField(), fieldError.getDefaultMessage());
        });
        return R.error(BizCodeEnume.VALID_EXCEPTION.getCode(), "数据校验出现问题").put("data", errorMap);
    }

    @ExceptionHandler(value = Throwable.class)
    public R handleException(Throwable throwable){
        log.error("错误: ", throwable);
        return R.error(BizCodeEnume.UNKNOW_EXCEPTION.getCode(), BizCodeEnume.UNKNOW_EXCEPTION.getMsg());
    }
}
